<map id="Graphical Class Hierarchy" name="Graphical Class Hierarchy"> <area shape="rect" id="node1" href="$a02129.html" title="std::_Reference_wrapper\l_base_impl\< __has_argument\l_type\< remove_cv\< _Tp \>::\ltype \>::value, __has_first\l_argument_type\< remove_cv\<\l _Tp \>::type \>::value &&__has\l_second_argument_type\< remove\l_cv\< _Tp \>::type \>::value, remove\l_cv\< _Tp \>::type \>" alt="" coords="5,5,215,137"/> <area shape="rect" id="node2" href="$a02173.html" title="std::_Reference_wrapper\l_base\< remove_cv\< _Tp\l \>::type \>" alt="" coords="263,45,423,97"/> <area shape="rect" id="node3" href="$a02249.html" title="Primary class template for reference_wrapper. " alt="" coords="471,52,619,91"/> </map>